Printing and dyeing industry wastewater reuse using MBFB membrane biological fluidized bed process more effectively reduce energy consumption

Guangzhou Environmental Protection Technology Co., Ltd. Qing Yan and Sun Yat-Sen Water Resources and Environment Research Center, South China University of Technology and other units, which lasted eight years, successfully developed MBFB technology and apply it to the petrochemical, paper, printing and other industrial wastewater treatment system depth deal with. Printing and dyeing industry is a large water consumption, total waste emissions and pollutants were ranked second and fourth in the country in the industrial sector, it is one of China's key polluting industries. Dyeing wastewater has been discharged a large amount of processing becomes difficult and important and difficult research of wastewater treatment processes. Meanwhile, with the rapid development of China's economy, water shortage has become a constraint to further development of China's printing industry constraints. In order to achieve sustainable development of printing and dyeing industry, printing and dyeing wastewater reuse resources become the key to achieving this goal. The use of advanced water reuse treatment process, on the basis of the existing sewage discharge standards, and further reduce the iron in water, COD concentration, on the one hand can be directly used as recycled water for washing, soaping and washing and other less demanding on the quality front The section; On the other hand treated water directly through reverse osmosis or ion exchange desalting, eliminating the process of multi-stage reverse osmosis and ultrafiltration technology security, reducing the pre-treatment costs, extend the life of RO membrane. After the water treatment process MBFB, in addition to the conductivity indicators, the water quality up to standard textile industry workshop back to the water industry requirements can be directly used for washing, soaping and washing workshop production process, can reach about 60% The recycling rate. Meanwhile MBFB process can also be used as pre-treatment stage reverse osmosis process, MBFB direct access to the reverse osmosis membrane desalination, and having to go through complex security and ultrafiltration station.